1) Prepare yourself for some stress during the last couple days prior to the cruise. It's inevitable. Fortunately, the excitement will help to counter that. And remember, once you're onboard, you can relax... and you <i><b>will</b></i> relax.
2) Remember that it's a vacation. You've been on the boards and you've learned about every possible activity you could learn about. But you'll decide to skip some of those activities so you can relax and enjoy yourself. And you will.
3) Go back to your suitcase. Take out half of the clothes that are in there. You won't need them. Take out half of the other junk you have in there. You won't need it.
4) Start saving up $1 bills to use for tips.